A rotating immersion test apparatus

Abstract

This invention discloses a rotary immersion test apparatus, comprising an immersion test chamber with an open upper section. A rotating sample stage for fixing the test sample is positioned above the immersion test chamber. The rotating sample stage is mounted on the output shaft of a rotary motor and is capable of rotational movement. The rotary motor is connected to a lifting mechanism via a connecting arm, and the lifting mechanism controls the rotary motor and the rotating sample stage to move up and down together. This invention can simulate corrosion processes with different flow rates and alternating wet and dry cycles, providing a testing method that more closely resembles the real service environment for the durability assessment of engineering materials.

Description

Technical Field

[0001] This utility model relates to the field of immersion testing technology, specifically to a rotary immersion testing device. Background Technology

[0002] In practical engineering, metallic materials, coatings, or composite structures are often exposed to dynamic liquid environments. Examples include marine equipment subjected to tidal impacts, hydraulic facilities subjected to turbulent erosion, and industrial equipment subjected to immersion in circulating media. Traditional static immersion tests primarily simulate the corrosion behavior of materials in static solutions, failing to replicate the effects of water flow, alternating wet and dry conditions, and dynamic loads in real-world service environments. This results in significant discrepancies between the test results and the actual failure modes of the materials.

[0003] Existing immersion test equipment mostly adopts a fixed immersion design, which has the following limitations: Although it achieves periodic exposure of samples and can reproduce the oxygen concentration gradient corrosion characteristics caused by tidal fluctuations or intermittent rain erosion, this type of immersion test is still a static immersion, which cannot simulate the mechanical erosion effect of liquid flow on the material surface, nor can it simulate the dynamic interaction of the liquid-solid interface under different flow rates. Furthermore, research shows that the mechanical erosion effect accelerates the destruction of the passivation film and alters the corrosion kinetics.

[0004] Therefore, existing testing methods cannot simulate dynamic corrosion environments, affecting the accuracy of material corrosion resistance evaluation, and the obtained test data may not be able to effectively guide engineering material selection and protection design. Utility Model Content

[0005] The purpose of this invention is to provide a rotary immersion test device that can simulate a more realistic dynamic corrosion environment by controlling the rotation of the sample and periodic immersion.

[0006] The technical solution of this utility model is as follows:

[0007] A rotary immersion test apparatus includes an immersion test chamber with an open upper part. A rotating sample stage for fixing the test sample is provided above the immersion test chamber. The rotating sample stage is mounted on the output shaft of a rotary motor and is capable of rotational movement. The rotary motor is connected to a lifting mechanism via a connecting arm. The lifting mechanism controls the rotary motor and the rotating sample stage to move up and down together.

[0008] This invention features a rotating sample stage controlled by a lifting mechanism. The stage can move downwards into the immersion test chamber for sample immersion and upwards out of the chamber, enabling periodic immersion corrosion tests. Simultaneously, the rotating sample stage is controlled by a rotary motor, causing relative movement between the sample and the fluid within the chamber during immersion, simulating the mechanical scouring effect of liquid flow on the material surface. Because the rotational speed of the rotary motor and the lifting cycle of the lifting mechanism can be independently controlled, this invention can simulate corrosion processes with different flow rates and alternating wet and dry cycles, providing a more realistic testing method for evaluating the durability of engineering materials.

[0009] This utility model also has the following preferred designs:

[0010] The lifting mechanism of this utility model adopts a screw lifting mechanism composed of a screw motor and a screw. The lifting nut on the screw is fixedly connected to the connecting arm. The lifting nut, the connecting arm, the rotary motor, and the rotary sample stage are controlled by the screw motor to achieve synchronous lifting.

[0011] The rotating sample stage of this invention is a disc-shaped sample stage. The rotating sample stage can be equipped with clamps and / or grooves for fixing the sample according to the sample test requirements, so as to fix the sample at different angles and simulate different contact conditions between the sample and the soaking fluid.

[0012] The immersion test chamber of this invention has at least one transparent sidewall to facilitate observation of the corrosion process.

[0013] The immersion test chamber of this invention is equipped with a temperature controller for adjusting the test temperature of the immersion fluid.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0015] This invention can realize a periodic immersion corrosion process and can simulate corrosion processes with different flow rates and different wet-dry cycles, providing a test method that is closer to the real service environment for the durability assessment of engineering materials. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the working principle of a rotary immersion test device according to the present invention.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1-Sample to be tested; 2-Rotating sample stage; 3-Rotating motor; 4-Immersion test chamber; 5-Temperature controller; 6-Connecting arm; 7-Lead screw motor; 8-Lead screw; 9-Electrical control module. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model more apparent, exemplary embodiments according to this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this utility model, and not all embodiments of this utility model. It should be understood that this utility model is not limited to the exemplary embodiments described herein. Based on the embodiments of this utility model described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of this utility model.

[0020] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0021] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art.

[0022] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0023] To fully understand this utility model, a detailed structure will be presented in the following description to illustrate the technical solution proposed by this utility model. Optional embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0024] like Figure 1 As shown, a rotary immersion test device includes an immersion test chamber 4, the upper part of which is an open structure, and a rotary sample stage 2 for fixing the test sample 1 is provided above the immersion test chamber 4. The rotary sample stage 2 is mounted on the output shaft of a rotary motor 3 and can rotate. The rotary motor 3 is connected to a lifting mechanism through a connecting arm 6. The lifting mechanism controls the rotary motor 3 and the rotary sample stage 2 to move up and down together.

[0025] In one embodiment, the lifting mechanism is a screw lifting mechanism consisting of a screw motor 7 and a screw 8. The lifting nut on the screw 8 is fixedly connected to the connecting arm 6. The lifting nut, the connecting arm 6, the rotary motor 3, and the rotary sample stage 2 are controlled by the screw motor 7 to achieve synchronous lifting.

[0026] In one embodiment, the rotating sample stage 2 is a disc-shaped sample stage. The rotating sample stage can be equipped with clamps and / or grooves for fixing the sample to be tested, so that the sample to be tested can be fixed at different angles to simulate different contact conditions between the sample and the soaking fluid.

[0027] In one embodiment, the immersion test chamber 4 has a transparent sidewall to facilitate observation of the corrosion process; in other embodiments, more than one transparent sidewall may be provided.

[0028] In one embodiment, the immersion test chamber 4 is equipped with a temperature controller 5 for adjusting the test temperature of the immersion fluid. The temperature controller 5 can be a heater or a heat exchange facility.

[0029] Experimental Example 1:

[0030] The sample 1 to be tested is fixed on the rotating sample stage 2. The test surface is parallel to the diameter of the rotating sample stage 2 and forms a 60° angle with the horizontal plane. The rotating sample stage 2 rotates at a speed of 100 rpm and rotates clockwise. Every 6 hours of soaking, the connecting arm 5 starts to move vertically upward to completely expose the sample to the soaking solution and maintains this position for 1 hour. This constitutes one soaking cycle. In this embodiment, three soaking cycles are performed.

[0031] Experimental Example 2:

[0032] The sample 1 to be tested is fixed on the rotating sample stage 2. The test surface is parallel to the diameter of the rotating sample stage 2 and forms a 60° angle with the horizontal plane. The rotation speed of the rotating sample stage 2 is 100 rpm. After rotating clockwise for 3 hours, it is changed to rotating counterclockwise for 3 hours. After every 6 hours of soaking, the connecting arm 5 starts to move vertically upward to completely expose the sample to the soaking solution and maintains it for 1 hour. This is one soaking cycle. In this embodiment, 3 soaking cycles are performed.

[0033] Based on the above experimental examples, by adjusting the rotation speed of the rotary motor and the lifting cycle of the lifting mechanism, corrosion processes with different flow rates and alternating wet and dry cycles can be simulated, providing a test method that is closer to the real service environment for the durability assessment of engineering materials.

[0034] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A rotary immersion test device comprising an immersion test chamber, characterized by, The upper part of the immersion test chamber is an open structure, and a rotating sample stage for fixing the test sample is provided above the immersion test chamber. The rotating sample stage is mounted on the output shaft of a rotary motor and can rotate. The rotary motor is connected to a lifting mechanism through a connecting arm. The lifting mechanism controls the rotary motor and the rotating sample stage to move up and down together.

2. The rotary soak test apparatus of claim 1, wherein: The lifting mechanism is a screw lifting mechanism consisting of a screw motor and a screw, and the lifting nut on the screw is fixedly connected to the connecting arm.

3. The rotary soak test apparatus of claim 1, wherein: The rotating sample stage is a disc-shaped sample stage.

4. The rotary soak testing apparatus of claim 1, wherein: The immersion test chamber has at least one transparent sidewall.

5. The rotary soak test apparatus of claim 1, wherein: The immersion test chamber is equipped with a temperature controller.

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